By Sarah Robson
Prime Minister John Key has potentially been implicated in the ACC privacy breach saga, with leaked correspondence showing he supported the woman at the centre of the row in her multi-million-dollar private insurance claim.
Mr Key is listed as a supporter of Bronwyn Pullar in 2007 correspondence between Sovereign Insurance and former National party president Michelle Boag, regarding Ms Pullar's private insurance claim.
Mr Key was the leader of the opposition at the time of the correspondence, which was anonymously leaked to TVNZ's Close Up programme.
The Green Party says it's now essential an independent inquiry is held into the privacy breach saga.
"This raises the question of whether John Key did declare his full involvement in this case," Green Party co-leader Dr Russel Norman said.
"It also raises the question of whether, in the conduct of his private investigation into Nick Smith's conflict of interest, he too had a conflict of interest.
"These are questions that only an independent inquiry can legitimately answer," he said.
Mr Key has previously ruled out an independent inquiry into the matter.
"If it is true that the Prime Minister has no knowledge of being named in the Sovereign letter, or that his support of Bronwyn Pullar was as he has previously described it, then he has nothing to fear from an independent inquiry," Dr Norman said.
Mr Key has previously described his relationship with Ms Pullar as distant.
In a statement, Mr Key said he has not been involved in any "claims support" or "advisory team" for Ms Pullar, TVNZ reported.
The ongoing saga has already resulted in the resignation of former ACC minister Nick Smith.
Labour MPs and Radio New Zealand, were on Thursday served with defamation papers over allegations ACC Minister Judith Collins leaked a confidential email to the media.